(Edited for brevity)
I haven’t used the Pinnacle, but I do own the Spider, and it packs surprisingly compact, more compactly than my other remote canister stove (FMS-117t). Because all the support legs fold to one side (rather than inward, like the Pinnacle and FMS-117t), it folds flat and leaves more room in my pot for a fuel canister. While I like the weight of the FMS-117t, the Spider is much more packable. You may find the Spider has a similar advantage over the Pinnacle.
An ideal stove might be a combination of the Spider and the Kovea Supalite/Snow Peak Litemax: a titanium remote canister stove with pot supports and legs that fold flat, and a preheat tube for winter use.