It's my understanding that all the 27" wide dryers that match the whirlpool made front loaders (Duet) are the same basic dryer but with a different front and a flat top.
Same goes for the stackable coin-op dryers.
I like the 29". It's just been around since the 60s and it's still made. I can't even count how many I've cleaned, fixed, used, and sold over the years.