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While gain is an important factor, more is not always better. A preamplifiers job is to overcome the loss in cable and splitters as well as poor tuner noise figure. Gain in excess of those needs may not hurt, but may come at the 'cost' of the preamplifier being easier to overload.
You have a few medium strength signals and a high gain antenna. The AP2870 would have a bit better resistance to overload than the 10G222 which is sold as a weak signal, deep fringe preamp. Both have similar noise performance and switchable FM traps in addition to the separate UHF & VHF inputs. I would lean toward the AP2870.
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