Trying to choose a Hobbywing ESC & motor combo for 1/10 off-road 4x4 buggy and/or 2wd stadium truck. Will not be used for racing. Is there any reasoning to pick the EZrun over the Quicrun, or vice versa? Is one better than the other? I've tried searching this with not much luck.

waterproof is a nice feature to have, I would consider that which will negate the ability to run a sensored motor which is only necessary in racing for smoother throttle response

I agree, sensored motor isn't necessary for this application. I'm leaning towards the Hobbywing EZrun MAX10 sensorless ESC, w/ EZrun 3652 G2 4000kV motor combo ($101). Originally I was looking at the Castle Sidewinder 4 sensorless ESC, w/ 1406 4600kV motor combo ($130). But it seems like many folks prefer Hobbywing over Castle, even without considering the slight price difference. I don't have experience with either.

A lot of people got burned by Castle with their earlier versions of ESC which were notorious for having a weak BEC, folks were getting brown outs and had to buy glitch busters and UBEC's to fix the design flaw. The newer Castle ESC's have fixed their BEC issue and provide a really good quality ESC today.

Not sure if Castle offers a "trade-up program" but HobbyWing will give deep discounts which have varied anywhere from 25%-60% (on the trades I've made) depending on the trade/age of an older/damaged ESC for a new one. That has kept me loyal with HobbyWing plus their quality has lasted longer without problems for me more than any other brand of ESC I've owned over the past 10+ years.

Anyway, you can't go wrong with HobbyWing or Castle, both are solid brands.

Great info bill, good to know. First time I've heard about the "trade-up" program, thanks. My local hobby shop stocks both Hobbywing and Castle combos I mentioned. Whichever ESC and motor I go with will be going in either my Schumacher CAT XLS or one of my Futaba FXT stadium trucks. I just hope it won't be too much power for either transmission using 2s Lipo or 7-cell NiMH batteries (not planning on installing the Schumacher Pro transmission in the CAT). I'm opting for the higher 4000kV motor in lieu of the 3300kV due to the 4000kV having less initial full throttle torque. If that theory make sense? Because I recently watched a video of both of those Hobbywing motors dyno tested. The less torque 4000kv motor would be less stressful on the trans even though having higher rpm, is what I'm thinking.

If it were me, I'd go with the 3300KV motor simply because it will have lower revs and produce less heat, just be sure to dial back the punch to the lowest setting on the ESC and put some negative expo on the throttle, even better if your radio has a throttle speed setting which will soften the acceleration and put a lot less stress on the drive train.

Good Luck!

Ok thanks for the tips. One reason I was preferring the HW 4000kv motor in lieu of their 3300kv was because I already have a Reedy SC600 ESC & Reedy 3300kv brushless sensorless motor combo that came in my RC10T4.3 rtr. Idk how much of an apples-to-apples comparison the Hobbywing 3300kv vs Reedy 3300kv motors are, but I was thinking I'd like having the different kV rating variety.

If I was going to install a motor in a vintage car then I would go with a finned 540 motor which is the same rotor from a 360 motor which will produce significantly less torque and will be less likely to damage the drive train because the vintage cars were never designed to handle brushless power and this would be a decent compromise:

https://www.rcjuice.com/motor-esc/br...ess-motor.html

Well just purchased a couple vintage Novak ESC's, a Super Rooster & Rooster. Along with a few vintage Trinity motors; Speed Gems Topaz 11T, Ruby 16T, Speed Gems 2 Ruby 16T and re-release Speed Gems Nitronite 12T. So the brushless may not see either of the vintage units.
Still getting the Hobbywing EZrun ESC & 4000kv motor combo simply because I like to have the variety.