TM1814 vs WS281x

Would a TM1814 strip be supported by Pixelblaze or no?
Reason being I have a long run before the strip and 24v RGBW strips in the TM1814 variety are less expensive.

Unless @wizard specifically added support, which would be documented somewhere, No.

It took specific changes to make it work in those comments.

That said, as discussed in the recent output expander discussions, you could reprogram the output expander (nontrivial) to talk that protocol, and then it would work.