Not at all.
brakes on gun in about the powder capacity and down from the 7 rem mag, are not as efficient.
Not a thing. A guy might not notice the difference as much when a round isn't near or above their recoil tolerance, but brakes remain to make a big difference in recoil velocity of the rifle even down to the lowly 22LR. Brakes bring a lot more to the table than just mitigating shooter pain.
I have a DPMS Miculek brake, it's cheap, and it does reduce recoil, but it's really not a very efficient brake, better than bare muzzle, but not really a great brake. Brownells accidentally threw it in the box with one of my orders several years ago, so I stick on rifles here and there until I get a better brake, or use it as a thread protector for a rifle I usually shoot suppressed. The oblong port, straight through milled, gill type are pretty basic, PRI Quiet control are almost identical to the DPMS Miculek, and I use a lot of those, largely for the looks and low cost. Linear Compensators like the Kaw Valley Precision will reduce recoil, but not as much as a ported brake. The nice part about Linear Compensators is the fact they reduce recoil AND reduce blast volume to those on the firing line beside the shooter. The Ultradyne models will reduce recoil more than the straight through type. I really like the American Precision Arms (APA) Lil' Bastard and Fat Bastard, the Area419 Hellfire, and the Piercision 5 port Muscle Brake. I have a bunch of SilencerCo ASR brakes on rifles as well, which do surprisingly well for a straight through milled type. I also use Holland Radial Port brakes and Vias heli-port type brakes. The heliport types aren't as good for prone as a gill type, as they kick up a lot more dust than the side port types.
One big advantage of the Seekins Nest, APA Bastards, Area419 Hellfire, and Piercision Muscle Brake is the "self timing" feature. For most gill type brakes, the brake has to be machined to "time" correctly to the barrel. Meaning the brake has to be trimmed or shimmed to make it level with the rifle action. Heliport brakes and Linear Compensators are symmetrical, so there's no wrong way to orient them, but the gill type have to be timed to the barrel. These self timing models have jam nuts to let the shooter time the brake without a lathe or shims.
For my rifles, APA, Area419, or Piercision.