Layer both — squalane base, rosehip target. Squalane is the universal base (0/5 comedogenic); Rosehip has trans-retinoic acid for active scar turnover. Apply rosehip first, then squalane to seal.
For the scars themselves, rosehip is the one doing the work — squalane just keeps skin comfortable. The smart acne-recovery routine: keep breakouts controlled, then rosehip nightly on marks (it is low-comedogenic for most), with a bland moisturiser. Patch test first — and SPF always, or the marks return.