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Satellite signals are already amplified at the dish so they will overcome downstream substantial cable loss. Antennas may or may not be amplified, you have to do the math.
Satellite installers use standard RG6, usually quad shield, for their installations. That cable is 100% compatible with TV signals and is virtually indistinguishable from what you can buy either online or in any big box store. I should know, I've tested numerous samples as part of my job.
Splitters intended for satellite use are optimized for that usage, they may or may not be usable for OTA signals. It's simply better to use a known item in the first place instead of experimenting if one wants it to turn out right the first time.
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