Here are the two modulars we'd point a value-minded, certification-first buyer at, head to head. Both the HJC RPHA 91 and the LS2 Advant Xcarry genuine ECE 22.06 with P/J homologation for well under flagship money. So the usual US-versus-Europe certification gap doesn't decide this one — the tiebreakers are weight, independent data, and noise.
Certification: a near tie, with one edge to the HJC
Both hold ECE 22.06 with P/J — current rotational standard, approved to ride open. The tiebreak is independent testing: the RPHA 91 has been SHARP-tested at 4/5, real third-party impact data, while the Advant X is not SHARP-rated. That doesn't make the LS2 less certified — the homologation is the same — but it means the HJC has an extra, independent data point on its side.
Weight: the Advant X wins
The forged-carbon Advant X is around 1,550 g; the composite RPHA 91 is around 1,740 g. That ~190 g is meaningful on a long day, and it's the LS2's clearest advantage — a genuinely light flip-up with the current certification is a rare combination.
Quiet, finish and features
The two are closer here than either is to a premium Shoei. Neither is whisper-quiet; the RPHA 91 is generally regarded as the more sealed of the two, while the Advant X's lighter shell trades a little silence for a lot of weight saving. Both offer a drop-down sun visor and a Pinlock-ready shield; the RPHA 91 leans on HJC's Smart HJC comms, the Advant X on LS2's Cardo-based 4X. Finish is comparable — both are value helmets that punch above their price without pretending to be flagships.
How to actually decide between them
Because these two are so evenly matched — same certification tier, similar price, both value standouts — the decision benefits from being concrete about your priorities. If you rank weightfirst (long days, a lighter feel on and off the head, less neck fatigue), the Advant X's ~190 g advantage is decisive and you should buy it. If you rank independent safety data and brand track recordfirst, the RPHA 91's SHARP 4/5 score and HJC's long history in modulars tip it, and it's marginally the more sealed of the two on the highway. If quiet matters more than either, honestly, neither is a silence champion — that's the premium-modular tier — so let the other factors decide and plan on earplugs.
One practical note on fit: the Advant X spreads its size range across only two shells, while the RPHA 91 uses four outer shell sizes, so if you're between sizes the HJC may fit more precisely. That's a small thing next to the shared certification, but it's the kind of detail that decides a close call — and this is a close call, in the best way. Both are helmets we happily recommend.
The verdict
Want the lighter helmet and the lowest neck fatigue? The LS2 Advant X. Want the reassurance of an independent SHARP 4/5 score and HJC's track record, and you're not chasing the last gram? The HJC RPHA 91— which remains our top modular pick overall. Both are genuinely good answers to "current certification without flagship money," and you won't regret either. Full detail in the Advant X review and RPHA 91 review.
