In reply to matthew_paraclimbing:
Which Ribelle model are you looking at? They're an impressive high tech range but the days I want to wear mine in Scotland are quite specific. Lovely and light and would definitely be better for scrambling, or use year round; in winter mine are used most for sunny fast moving days.
Mantas are heavier and more traditional, but also warmer, more supportive and more protective. In full on winter weather, wet conditions, or significant winter mountaineering I'd say Mantas win. I think they're the better all-purpose walking-into-easy climbing winter option for most people in Scotland. They'd be awful in summer though.
I think Mantas are a bit stiffer but still enough flex for comfy walking. In my larger size (with increased leverage) there's more give than a shorter boot would have, and size depending that may affect how steep you'd want to climb in them. For me they're ideal for winter walking, through to grade I gullies and classic grade II ridge traverses. Anything more sustained, steeper or more technical and I'd be wanting a full B3. I'm sure there are others who'd climb harder in them, but I wouldn't choose to.
Reviews...
Current Manta Tech GTX
https://www.ukhillwalking.com/gear/footwear/mountain_boots/scarpa_manta_tec...
Older Ribelle Lite https://www.ukhillwalking.com/gear/footwear/mountain_boots/all_round_b1-b2_...
Old Ribelle Mtn Tech https://www.ukhillwalking.com/gear/footwear/mountain_boots/scarpa_ribelle_m...
Above all else though, a boot is only any good if it fits you well enough to comfortably wear all day. You'll need to try them both on (plus whatever other brands/models available) if you haven't already.
Post edited at 19:47