// One version has EC and the other doesn't - may have been written later.
				// Compare without considering EC.
				a, b := eVer.header, oVer.header
				a.EcN, a.EcM = 0, 0
				b.EcN, b.EcM = 0, 0
				if a == b {
					continue
				}
			}
			if !strict && eVer.header.matchesNotStrict(oVer.header) {
				if prefer == nil {
					if eVer.header.sortsBefore(oVer.header) {