Can't say I spent time there. HON/F I was only lucky enough to catch a ride in Zurich last year (one of these days, hopefully... ). For VIE I'm going from a brief look in, and online reviews (including San Gottardos up here).

I did pass through SEN and FTL lounges at all the other LHG hubs (+ LO and LG) and in particular Zurich I'd say looks much more enjoyable than Vienna HON, as far as I can tell. (Provided you aren't stuck in A in a time that can be described by anything than "far from busy"...)