Oh, if your looking at actually using the Griffin in its FireSupport role, then yes, the 1N is the mech for you.
Me, I tend to view the 55 ton 5-8-5 category as the ultimate brawler size, so I love the 1S model.
If I want fire support I use Crusaders, Archers, & Catapults......or Whitworths, or even tiny Valkyries.
That or I go 3050 and use 3M models that pack the ERPPC, the LRM20, and the DHS to fire them both.