sera snipers have siege mode, not entirely sure if they outrange ravager with it but I'd guess so. Besides that, they have the strongest t2 shields meaning if you have a couple of sniperbots with a shield you can still just kill it besides them being in range cuz of their high dmg.
Aeon snipers still did the same. They countered percies, bricks, ACUs etc., the main situation where the range dif mattered were sera snipers against aeon snipers.