I sat in all three recently. Not for long periods of time but here were my initial impressions.
The base seats are the softest but lack the deeper bolstering. I have them in my 4BW. They don't look as cool as the upgraded seats but they are noticeably more comfortable. They only have control for the lumbar and upper side bolsters. No bolster control for your hip area. This is party what makes them more comfy as you are sitting on a cushion and they are a little easier to get in and out of. They are not leather, they are Inteluxe, which is really vinyl. Easy to clean but not from a cow.
The next step up is the mid tier sport seats that have a combination of leather, microfiber suede, cloth and Inteluxe. Here you pick up the deeper bolstering but they feel a little softer than the top tier leather seats since you are sitting on the suede. No ventilation or massage. This is a good middle of the road if you want the sporty look but want to save some money and they are pretty comfortable. Not as soft as the base seats but not as firm as the full leather seats.
You pretty much know the drill on the upgraded ones since you own them already. Have you adjusted the lumbar setting on your seat to see if you can dial it in to your liking?
The 2022 Cadillac CT4-V Blackwing offers 3 different interior color combinations along with 3 different seat trim material options. See them all right here.
cadillacsociety.com
Here's a closer look at Inteluxe, Cadillac’s new leatherette seating upholstery. It'll be found across the brand's 2022 lineup.
thenewswheel.com