i guess the easiest comparison would be h23 has 160 hp stock and h22a has 200 hp stock. i think i'd like the extra 40hp for roughly the same price. but that's my

better yet, you could put your h23 block internals into the h22a and gain the .1L. yes this works. u could also build u'r h23 block, and build an h22a head and put that on top, for the best of both. however u'd have to do a little more work than just swapping the internals into the h22a.