It's really impossible to compare these two shelters in a vacuum, as they're chosen by different people with different preferences for different applications. I have owned both shelters and both are supreme in their form and function. From there it's just personal because one isn't better than the other.
The Redcliff is gigantically larger inside and offers hugely more space. More standing room. It's a hotel for two men, while the Sawtooth is much ....hmm...cozier lets say. Based on what I've seen and experienced, I'd choose the Sawtooth over the Redcliff for extreme wind/storm performance. It simply will shed wind better and has a lower profile, while being built undeniably strong. I didn't like the low-sloped 'foot' end of the Sawtooth, as it's not easily accessible for gear storage and retrieval without getting on your knees. The center-pole on the Sawtooth is very strong (trust me) but the shelter design puts it close to the entry....meaning you have to go around the pole a LOT.
The Redcliff demands a bigger footprint site, so possibly an issue. On the other hand the Sawtooth isn't exactly minimalistic either. The Redcliff is much faster and easier to pitch with no setbacks and no secondary pole. Redcliff comes equipped with a sod flap....not so on the Sawtooth unless it's been changed.
I think the only way to compare these shelters is know the locations and conditions under which they'd be used.
Sawtooth in sheep country where nothing but rocks existed. Total exposure to brutal winds. The Redcliff would definitely not go there with me.
Sawtooth in my moose camp. It worked great but I craved more room on a 15 day stationary hunt.
My Redcliff in moose camp, with partner's Sawtooth adjacent.
Redcliff sheds snow extremely well with guy-outs snugged.
My Sawtooth in a surprise overnight snowstorm. No issues but it's not as adept at shedding snow as I imagined it to be.
Lastly: Pay close attention to the images. You'll notice the Sawtooth fabric lines have more of tendency to be concave (a bit of sag) whereas the Redcliff design produces a smoother and cleaner exterior shape. I'm sure that's because of the different shapes....asymmetrical on the Sawtooth and symmetrical pyramid on the Redcliff. Maybe part of it is design execution as well....I'm not qualified to judge that.