Alla time same same.
Rattleware tampers are heavy, comfortable and well made, and under $35.
Coffeecomplements.com sells similarly reasonably priced tampers, beautifully machined, and with more variety. For a $9 up charge, they will mill a tamper to whatever custom size you desire. If you want a 58.3mm tamper, you can have it for under $45 delivered.
The major differences between those and expensive tampers is mostly vanity. I like Concept Art, very attractive and very expensive.
The same can be said of Reg Barber tampers. Those and quite a few other brands are much better made than needs be.
I especially like my Concept Art Technic which clicks at a given pressure, not because of the click but because of the looks, weight and feel in the hand. The Technic doesn't make coffee any better than using the same (interchangeable) 58mm base on a wood handle (have one of those), or my old Rattleware for that matter.
Cafelat are also very popular and well made. Their price/quality just about splits the difference between Reg Barber/Concept Art and Rattleware/Coffeecomplements/ChrisCoffee (OEM). Like Concept Art, Cafelat makes an extensive line of other, high-quality coffee accessories.
I know a few people who swear by Reg Barber ripple bases, and a great many more who say "no detectable difference." It might be a different story if I already had an RB handle, but don't think the experiment is worth the price. Similarly, I'm highly skeptical that a 58.35mm tamper would perform better in my Strada baskets than my 58mm bases to the extent of a positive difference in the cup.
As long as the tamp is level and consistent* you're good to go. A little bit of heft seems to make that easier for most people, and so does an appropriately sized and shaped handle.
*Any tamp pressure that's sufficient to bring the grinds together into a puck, but not so great as to clog the flow will work. But you want to keep your pressure fairly consistent to eliminate one variable in flow resistance, and use time of pour to help judge whether your grind is correct.
Drop a nickel in the pot Joe. Takin' it slow. Waiter, waiter, percolator