My friend has a straight grip winchester 94 in 30.30. I have a Marlin 336 in .35 remington with a pistol grip. We fired both multiple times and both of us agreed the .35 with the pistol grip had much less felt recoil. This was comparing 170 gn 30.30 to 200 grain factory loads. Now, this really isn't apples to apples, but we both thought the .35 would recoil harder than the 30.30. I think the pistol grip stock just fit both of us better than the straight stock.
Really, felt recoil has a lot to do with how the stock fits you, and how you mount the gun. This becomes very apparent in a game such as sporting clays or five stand. It's not unusual to fire several hundred rounds in a couple of hours........mount the gun wrong and a fellow leaves bruised.
I also have a Marlin 1895. The factory 405 grain remingtons are more of a push than sharp blow. The 300 grain remingtons up the recoil a little. The PMC 350 grain HA or +p+ is a fairly heavy recoiling load and is sharper and quicker. Don't forget there are some very good recoil pads available.....I put a limbsaver on mine and was so amazed I had them installed on all my rifles.
The one thing I really like about the 45.70 in a modern action is the round is just so versatile. Load it down and shoot cowboy. Load it mild for deer, and load it up if you feel the need. It's a great old round!