Edited/expanded:
I just bought the 2025 Ioniq 5 SEL AWD. So far It's very nice. I also have a 2021 Tesla Model Y. I don't enjoy driving the Tesla because of Musk, and I'm about to wrap it in Camo with appropriate disparaging stickers.
That said, here's my experience: (I just picked up the Ioniq four days ago, so this can change)
Handling/Driving:
I feel more connected to the road in the Tesla.
Acceleration / 0-60: About the same, I've read. One can get a software upgrade from Tesla to shave ~.6 seconds from the 0-60 time. Silly.
One pedal driving. Re-engaging the i-pedal each time you shift into Drive is slightly annoying, but otherwise, the regen works nicely. I just read this:
If you have the car in ECO mode, i-pedal forces AWD, reducing efficiency. I did not know that it disconnects the rear motor at speeds below 30. Supposedly, this is why the i-pedal is deselected each time it's shifted to Drive.
I like the Tesla's shifting much better. If you are in Drive and want to reverse, you push the stalk up as long as you are under five mph. There's no need to stop or step on the brake first.
Comfort:
It's too soon to tell, but I think it's very good.
The Tesla is very comfortable as well. Most cars kill my lower back, and I have to stop and stretch rest after 45 minutes. I have a Chevy Bolt, ugh.
Auto-steer / speed control:
The Tesla's self-driving is really good. I will miss that in the Ioniq.
Noise / Ride:
Noise:
I compared the two cars with an SPL meter, using "A" weighting.
The first comparison was at 55 MPH, HVAC off. The Ionic 5 was about 5 dB quieter. That's what I would have guessed as well.
The Ioniq has a softer ride.
The Ioniq is about 350 pounds lighter.
Fit/Finish:
The Ionic's Digital Teal is gorgeous. It appears to change from green to blue from different viewing angles. Fit looks perfect, but I'm not an expert, and it's not something I would notice. The Tesla is a boring white, and the panel gaps are larger. But not something I usually would notice.
Range:
The range appears to be the same, but my comparison is limited. I drove the car back from the dealer in sport mode, and my wife drove the Tesla. But I drive faster and more aggressively. Both consumed 23% of the battery's SOC. Note that Tesla's odometer reads 27,880 miles. The Tesla battery is 71.5 kWh. The Ionic's is said to be 84 kWh. The Tesla is somewhat more efficient.
Audio:
Disclaimer: I am an audio engineer.
I didn't get the top trim with Bose, so I can't comment.
Many people talk about how good the Tesla's sound system is. It has a lot of speakers and achieves very high SPLs. It has a subwoofer that can create some loud bass sounds. At first, I was impressed, but I quickly realized it was unlistenable for music.
Android Auto/Carplay:
It's wireless, finally! It works perfectly so far. Tesla has neither Android Auto nor Carplay, and I haven't missed it. But now that I have used Android Auto for a few days, I like it.
Voice commands:
I haven't tried Ioniq's voice assistance, but I've read that it works well. Voice commands work well in the Tesla, such as "my feet are cold," "open the glovebox," "navigate to..," and virtually everything that you can't figure out how to do through the display.
The Ioniq's headlights are excellent, much better than the Tesla. Tesla has improved the headlights in later models.
The cabin lighting in the Ioniq distracts me, especially the huge, red-lit emergency button. I'll get used to it. Or cover it with a translucent sticker.
I will miss Tesla's enormous storage space, including the frunk and the area under the rear deck.
The Tesla has some quirks:
The windshield wipers sometimes auto-engage when it's completely dry out. Auto headlight dimming is quirky, too.
Purchasing:
I bought the car at Haselwood Hyundai. They were great, but as usual, we spent hours there. They quoted the out-the-door price over text, which most dealers refuse to do. It was MSRP less with Hyundai's $7500 cash discount. Also, Hyundai texted me a $500 coupon after visiting and registering on their site. The only unpleasant experience was rejecting the 3rd party add-on warranty, which I always do. If you are considering buying a car, please research the wisdom of purchasing extended warranties. Even though the car was manufactured at the new Georgia plant, it looks like it doesn't qualify for the federal tax credit. With the current administration, who knows?
Tesla:
I went online, clicked on the car, selected financing, and that was it. We drove to a Tesla location, and they handed us the keys (RFID cards).