I don't think I would alternate. I would be in a constant up and down state. If you've adjusted to the 25 I would give the 40 a try. I was fairly sensitive when first trying patches and later when increasing my dose. Both times I ripped off my patch within a day and tried again later, and both times I adjusted fine on my second try, settling on the higher dose.
As to whether there is anything to be gained, are you having flushes? I was really not seeking relief from the flushes so much as the brain fog and other symptoms, but I was still having hot spells on my lower dose. I think even if it's not your main concern, the flushes are a good indicator of whether your on a proper dose.