cant comment on the 190, but Ive been on both of ATs 717 & 737 and found although their Biz is 2x2 and coach 3x3 (717 is 2 x 3) that theres alot more leg room in ATs Exit Row then in their Biz rows. sat once in Biz and everytime after in coach, on that hard seat not that Biz is much better.
If the 190 is anywhere near to the 320s seats , Id rather be on JB then AT any day of the week. Once I use up the 2 remaining free tkts, Ill only fly AT if they are the only ones using a MainLine to that destination or are so much less expensive then anyone else to get me to where Im going.
BTW only way to get the Exit Row on AT is at the Airport, yet if Im flying back the next day, I was able when getting Exit on my Outbound to have them reserve/block the Exit for the next days Inbound