Frog. Try to pick it up, you’ll find out very quickly. Toads have dry, warty skin, and will let you pick them up with little drama. Frogs, on the other hand (!), will fight like fury, are incredibly muscular and will force their way through your fingers. I love toads, I wish I had them in my garden, but there’s no ponds anywhere near where they’d be able to spawn.
I did find a newt striding very purposefully across the concrete warehouse floor of a place I used to work, the nearest pond is roughly a kilometre away. Heaven alone knows how it got there, the wee thing was lucky it didn’t get smeared across the floor by a ton or so of forklift carrying another half ton of palletised paper. I put it into a little plastic box with damp tissue paper and took it to the pond on my way home.
And yes, I am aware that you need to have a license to handle newts, but I don’t think the little critter was going to call for a representative to complain.