Verified answer

CF45 is correct. Power-wise there won't be much difference between the two. The Daisy 35 is rated at 4.42 ft-lbs muzzle energy.(1) The Crosman 760 produces between 4 and 5 ft-lbs muzzle energy depending on the pellets used.(2) With average weight pellets it seems like power is about 4.1 and 4.4 ft-lbs muzzle energy in the Crosman 760.

As for which is the most durable... It's impossible to be sure since how well you follow the maintenance instructions matters, but I'd guess the Crosman 760 will probably be a bit more durable since Crosman's pump mechanism's tend to be a bit more robust than Daisy's in my experience.

As far as better options go... CF45 mentioned the Daisy 880. He left out the Crosman 664, but that's OK since I'll mention it now. Basically for a little bit more money, say an extra $20, you can get a better airgun that you'll probably be happier with over the long run.

The Daisy 880 is a nice airgun given that it costs less than $50 at Walmart. It produces about 7.6 ft-lbs of muzzle energy, which while not great is respectable.(3) And because it's got a rifled barrel, it can deliver surprisingly good accuracy. I'd say 1-1.5 inch groups at 50-75 feet with a variety of inexpensive pellets should be the norm. It's biggest weakness is that it's not the most durable pump pneumatic ever designed. Don't get me wrong, it will last for several years if you take care of it. But it's not going to be a family heirloom. For the cost you could do much worse.

The Crosman 664 is another nice airgun. The current model retails for about $50 from Pyramid Air.(4) It produces about 6.3 ft-lbs of muzzle energy, which again, while not great is respectable.(5) Accuracy with a new Crosman 664 won't be as good as I remember from my old Crosman 664 or from a Daisy 880 since the new 664's don't have a rifled barrel. However it should still produce 1-1.5 inch groups at 50 feet once you find the right pellet. And given it's a Crosman multi-pump it should be a bit more durable than a Daisy 880. All in all it's a good little airgun that fixes some of the shortcomings of the Crosman 760 it's based on.

They're both smooth bore airguns and both claim 625fps with BBs

Not much difference between them.

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Added for info

If you want a bit more power and accuracy take a look at the Daisy 880

750fps with BBs and around 660fps with 7.9gr pellets, plus the 880 has a rifled barrel for greater accuracy(pellets). Walmart has the 880 for around $45