Turn 5 had i95 weapons, while Zenith (patch 2.0) was i90.
Turn 9 had i115 weapons, while Novus was i110 (patch 2.2). Only a patch later (2.3) Nexus was added and evened the iLevel of i115.
Turn 13 had i135 wapons, while Zodiac Braves was i125 (patch 2.4). Only a patch later (2.5) Zeta was added and evened the iLevel of i135.

The only reason Relic weapons were better than Raid weapons in some cases is because of the customizable stats. But considering that secondary stats are quite a bit less important than they used to be, the new Relic might never be stronger than the current Raid weapon.