I already have 2 Model-13's and I just found a Speed Six. I like the 13's and the forcing cone is "not" an issue if you don't shoot low-weight, high pressure rounds.
I was shooting wadcutters out of a Model 10 at the time. It's a very tight gun with no hint of a timing problem at all. I suspect it just had some lead build up at the forcing cone, which is very week on the K frames. I scrub the crap out of that thing, now, after shooting. Shooting jacketed bullets would avoid that, but I cast my own and won't own a gun that doesn't like lead.
I had a M19. It was more accurate than my security six for sure with .38 special. The Security Six shot wadcutters about 4" at 25 off a rest, the 19 about an inch and a half. My current Taurus 4" M66 will put 'em into 1". These guns all shot well with magnums. Some .357s just don't seem to like .38s for some reason and the Security Six is one of 'em. I traded it for a Blackhawk and haven't been unhappy about that. My blackhawk has taken a couple of deer since. I hunt with it. It has a 6.5" barrel, strong to the max, great outdoor gun. I sold the 19, but kept the M10, just rebarreled it.
For my uses, outdoor carry, the Taurus I own now is the most accurate 4" medium frame .357 magnum revolver with both magnum and .38 loads that I've ever owned. It's just awesome, great trigger, strong gun, ROUND forcing cone with no flats on the bottom. It doesn't have the strength of the Security Six, but it'll shoot rings around that gun. I've been easy on it with the hot loads and it's held up well, still tight as a drum.
As for feel, I preferred the Smith even though I had Hogues on both. The Smith was easy to shoot, the Security Six kicked like a mule, lots of muzzle climb, with magnum loads of any flavor that were even close to hot. The Smith was easy to control. I think that Security Six rode to high in the hand, lots of muzzle flip on recoil and hard to shoot fast with. Hell, my SP101 was easier with hot loads, believe it or not. So, advantage Smith and Wesson in handling. But, that's a very subjective thing that can vary from shooter to shooter. Just giving my opinion. I just sorta lost faith in K frames after that forcing cone incident. It was a better shooting gun, though, than the Security Six all around. I had a sweet trigger on that Security Six, though, after working it over. Really liked its simplicity and ease of working on. I won't do my own trigger work on a K frame. I'd rather pay someone that knows more what they're doing. LOL