All right let's see what we've got cruiser-wise in the North Atlantic.
C1 is Newark. Big battery of 6 inch guns but no armor at all. 19 knots.
C9 is Montgomery. A few 6 inch guns and the usual suite of smaller stuff like 5 pounders these ships seem to have. She should have some armor but how much is not clear how much. They said a 280mm Krupp in Havana fired on her from 9000 meters "apparently without effect". I don't know how well "protected" it was but I seriously doubt that the ship would be able to take a hit from a gun that size without taking at least some damage unless the shells were duds. I'm assuming it just missed at that range. Hitting a moving ship from almost six miles a way would not be easy.
C8 is Raleigh. She's actually in Asia. A bunch of 5 inch guns with minimal armor. 19 knots.
C-12 is Columbia. In the Caribbean. The class is unusually fast: a whopping 23 knots. On the other hand, she also has fairly thin armor and so-so armament, with a single 8-inch two 6-inchers and eight 4-inchers.
C-13 is Minneapolis. She's the same as Columbia.
C7 is Cincinatti. Mostly a bunch of 5 inch guns and some thin armor. 19 knots.
C 10 is Detroit. Looks like she's in the Caribbbean and she's pretty useful. Same design as Montgomery so again, not sure about the armor. I might retcon it so she gets smashed up instead of New York given that the captain of that ship's own zeal was responsible for Sampson's dangerously close approach OTL (which is what inspired me to write the incident into the story). Only 17 knots.
San Francisco is a mystery but I'm assuming she is more likely with the Caribbean than the North Atlantic.
The Spanish destroyers can reach 28 knots. The torpedo boats, about 25. The Spanish auxiliaries, if they use them, can manage about 18 or 19 knots. The armored cruisers should be capable of anywhere from 17 to 20 knots. Pelayo can't do better than 16, and that's pushing it. Not sure about support ships.