Pretty sure they're actually larger by physical dimension, though the layout is significantly different so that may play with the perspective. A1's have double-pane windows twice as wide as they are tall, with portholes near the vestibules and a skewed overall distribution along the car. A2's are single-pane...taller but narrower, and more evenly distributed along the car.Also, the windows seem a tad small. Are they smaller than on Acela 1, or is it just an optical illusion?
The layout differences probably explain why they strike the brain as being more divergent than they actually are dimensionally. I doubt the view is much different inside-out from your seat. The A1's already start out with pretty sweet views and lots of natural light. If the A2's match or somehow improve on that it's all gravy.
Siemens Viaggio Comfort. That's what's being ordered for the do-over contract for Chicago Hub & California statie coaches, and that's your pole-position bidder for the 500+ Amfleet-replacement contract. No more shitty AmCan submarine portholes if this is your view from NE Regional coach class come 4 years from now. . .Meanwhile, these Florida trains are slower than Acela but IMO look more modern to my eye.
Virgin/Brightline uses same exact Siemens Charger loco as Amtrak ordered. They just went with the wholly cosmetic aerodynamic nose, nose cover for the couplers, and no fixed snowplow (it being South Florida and all). Strictly for looks; the extra curves don't serve any real function. Amtrak's Chargers have a flatter face, perpetually exposed layover yard ground plugs and coupler for multi-loco lashups, and obviously the bigger all-weather plowblade.