You'll like them both...!!!
Ok... What kind of advice...??? I have both... Others do as well I am sure... The 22/350mm is a laser, this rifle has a bit of a bark, I use a DonnyFL Sumo on a DonnyFL adapter and it tames it a lot, it's a hard hitter... The 177/250 is also a laser, not much to dislike about Lothar Walther barrels or the Edgun Leshiy… It's one of my favorite air rifles...
Ken