Specs are quantitative aspects of the option such as the price
Pros
Pro
A lot of servers ("universes") to choose from
OGame has many universes to choose from, most off which have modifiers that change some part of the game (mostly speed of resource accumulation, building and fleet actions, but also other factors).
Almost all parts of the game take real-life time, leading to players having to wait for new resources or their ships to have finished transporting or raiding before doing things again.