for the most part, alpinestars are considered the most comfortable race boots you can buy. they will most likely fit under your jeans unless you're one of those guys who wears ass hugger tight skinny jeans.
I'll have to go along with that, short of any custom made footwear.
But, comfort on the bike and comfort walking are waaaaay different. I've had a pair of SMX-4's and currently a pair of SuperTech R's. I've also tried on a pair of "sporty" Berik's, and a set of Sidi Vertigo Corsa's.
I sat on a bike with all of those, and while granted, its not riding and living with them for months on end, they all felt nice and comfy on the bike. Y'know, snug and secure feeling, etc. The Corsa and the TechR's felt the best for restraining ankle movement though.
But off the bike, the Vertigo Corsa's were terrible. Lovely big ankle braces and footstraps, but they moved very little, which made walking very stiff. And very squeaky
The Berik's and the SMX-4 have no bracing at all, and were fine for walking in.
The TechR's I've found to be just like a shoe for walking in, much like the non braced boots. But yeah, they have a nice secure ankle brace too. They moved a lot easier though, the whole front bellows part is TPU, rather than accordian leather like on the SMX and Berik. A lot "flexier"
For the kind of person who needs and does want to feel comfy walking, I'd always go for the SuperTechR as they have some lovely protection, but without stupid stiffness. Seeing people always go "ohhh nah, race boots are so uncomfy, I'll take the work boots plz" is just terrible. They obviously haven't tried a good pair of properly fitting boots. Much like the sneaker brigade will say a boot takes too long to put on or something
But then again, it's kinda like a helmet. Different manufacturers have different foot shapes. The SMX-4 had a very large toebox area, good for wide feet. The Sidi's were narrower through the foot. These are the things that will matter after a few hours in the saddle. Go and try lots on if you can, thats the only way.
Joe finds most AStars to be uncomfortable. Great. Maybe he was trying the SMX-Plus model?
I find the ones I have to be comfortable. Great. I haven't tried the SMX-Plus model.
Plus his feet may suit a Dainese boot better. And obviously they do, he has found what works for him, and I have found what works for me.