#1 . . . that looks like the Special/Training Rifle. I can't always tell. I've been corrected a couple of times . . . anyway
#2 . . . that's the 10 round magazine. The 5 rounders, steel or poly just barely protrude beneath the stock . . . just the base of the mag.
#3 . . . (and second answer for which you didn't ask) Out of 50+ mags for the 452, I've yet to find one that does not function properly. The 10 round only comes in Poly (plastic), but the 5 round comes in steel and poly. I like the steel, but I buy the poly when they're on sale . . . they all work.
The ten rounders I have caught on things while hunting, but not often. I use the 5 rounders, regardless. Standing, I like the 10 rounders . . . would like a 50 rounder standing. I bench shoot off a Caldwell Dead "something" Bag. Some days, the 10 rounder barely clears the bench. Most days, it doesn't clear the bench and acts like a fulcrum . . . don't like that.
Oh, I didn't mention the Ultra Lux, before. It has a 28. something barrell and the rear tangent goes out to 300 yds. They have a beechwood stock like the one you pictured. They're usually a little cheaper than the Lux. Longer sight plane and an extra 100 yd sight adjustment. I've been wanting one but haven't talked my self into it yet . . . I will though.
Most of my posts here have been regarding my 452s. I really shoot them a lot. I have even more rimfires from other manufacturers. I can say with confidence the CZ 452 or 453 is the best rimfire out there under $500. Anyway, my experience with the sights, mounting optics, triggers, groups, all that stuff I've posted to this forum.
I know they're ugly sticking out like that but they function well and Savage along with other manufacturers who use inline/single stack mags look just as ugly. I've found 5 and 10 rounders useful depending on situation.
Just buy a bunch of each and don't look at the gun from the side