When considering PV panels by type of polycrystalline or monocrystalline, monocrystalline photomodules should be preferred because their efficiency is about 2-5% higher. In addition, such panels are more durable and efficient in the summer due to the lower temperature coefficient. Monocrystalline panels take up less space than polycrystalline panels.
When you consider the manufacturer, there is no obvious guide. Most panels have very similar specifications, but Tier 1 panels have better build quality.