Squatty vases (slightly swung) are often more desirable. There are possibly a few reasons for that. The pattern tends to be more pronounced, and they are a little scarcer than the fully swung ones. They also look good in a display with taller vases in the same pattern.
The colour appears to be (regular) green. The tilt is not uncommon of course, and rather a lot of Carnival vases do tend to lean a bit to one side. Would that affect the value? Possibly a little.
Far more important (as regards its effect on value) is the quality of the iridescence. A sizzling iridescent cracker (my own choice of words....

) is always going to bring top dollar. On the other hand, a somewhat lack-lustre iridescence will not be as sought after.
You got them at a very good price - congratulations. It's also interesting that you found a pair of them. That's often the way things are found in the UK - especially with items that would display either side of the mantelpiece!
If you turn the vase round just a little...keep inching it round...you may find a position where the tilt is not apparent. Perhaps you could display them like that - not quite so irritating.
I love the quirkiness of Classic Carnival. That's part of its charm for me.
I hope this has answered your question, Adam P.
Glen