GT has up and downs all the way up to spooky wood, which is a blast if it's clear. If your doing GT park at the bottom car park, which adds a fair bit of up hill to the start of the red stuff, but on the way back take the blue return route from the top car park to the bottom (not the red), it is a …king scream, super smooth with drop off in spades, you can nearly be air borne on the way back! (i can't recomend the blue more, i lead groups there, usually doing the red routes and everyone loves it)
Inner is a **** of an up hill, some bits could have banisters there are soo many step ups! but it's one big slog followed a cracking down hill which goes on for ages. Down hill is in three sections; first is smooth with fast bearms, well warned drops with get outs. second is a bit woody, then a fecker of a drop which catches me off guard every **** time then fast tables and rock rumbles, last bit is black (3 foot drops) with red get outs (always seems to be fast fearless teenagers on tanks on this bit).
I really like Inner usually quieter, so you've not up someones arse or someone up yours. And it cuts out the whole saddle up, sus off, saddle down, sus off millarky! If you've got good legs easy to do both in the one day.