I've owned both Marlins and original and modern Winchester/Browning 1886's, I much prefer the action of the Winchester type.
Not sure where the idea the Marins are "stonger" came from, but those that work with them with very heavy loads say different. Either are fine for what most of us ever do with them, including some uncomfortably warm loads, so whatever difference there is in strength is in the mind of the beholder, and has little to no practical applicabilty.
So far, in fooling with various Winchester and Browning 86's for the past 30-some years, I've never had a need to take one apart to clean it, I was always able to clean them quite well without taking them apart in any way, even when shooting black powder.
It's more personal preference than real advantages on either side. I like the history, looks, feel and function of the 86 Winchester action. I find they are much easier to use for small game and grouse hunting when leaving the magazine loaded with full power loads, shooting the light loads singly. The chamber is much easier to reach, and the way the action cycles makes it much easier to eject the fired round, push the lifter back down, and load another round singly. The Marlin action is frustrating to do so the way the action cycles. If you want to scope one, the Marlins are simpler to scope. They are also a little lighter depending on the version of Winchester/Browning. My preference is the Browning 1886 carbine for carry in the mountains. I put good sling mounts on it, the front set into the band, a Lyman No 56 receiver sight, and had the barrel/magazine cut to 20".