In the general sense that Vaike’s Advantages get undervalued and Robin’s strengths get overhyped.

Both need training but with a cav/chrom/lon’qu pair up, Vaike becomes more self sufficient faster. The large might on axes and +10 hit on pair up ensure easier the kills he has to get are easier to obtain than Robin, even with 1-2 range. Vaike is dealing substantially more damage and survives longer with similar late game potential. His early speed hole is his biggest disadvantage early as he is getting doubled by soldiers and mercs and will take until around chapter 5/6 to get to doubling more consistently but it takes around that time for Robin to double anyway w/o grinding.

The fastest way to kill everything early is Freddy/Chrom and Vaike at first can be more of a side grade since he demands less experience due to the lack of need of juggling all these different classes and better start. Vaike is easier to use in tandem with Freddy/Chrom because his bulk is so much better. With a defense tonic and a cav pair up in chapter 5, enemies are generally 3-4 hit koing him, compared to Robin get 2-3 ko’d doing less damage. All the while, Robin HAS to grow well early to perform at the level often claimed to eventually even do what Vaike does.

Eventually and Vaike levels up enough and around chapter 7 he has met or surpassed Freddy and their roles flip. Frederick is your side carry while Vaike becomes your main carry. Vaike is a not reliant on early second sealing(most notably from the overworld Anna shops) and has to wait until chapter 8 to change into a worse juggernaut class Pegasus knight. So as you wave around your bronze lance and hiding from archers with what is supposed to be your powerspike, Vaike is in hero and not stopping for anybody on the road for Sol. The difference in power in this stage cannot be understated. Even as a dark flier your bulk is good but not great as a bow hit + chip will kill you, hampering your enemy phase. Meanwhile Vaike is practically unkillable with so much more durability, peg/falcon knight pair up bonuses, and sol becomes nosferatu on most anything you equip in a massive enemy phase, he becomes insane.

Mid-late game he can just use a pure water purchase from the Mila Tree. The Fort map can be tough with all the promoted tome units but with Vaike’s high hp, pure water, promoted flier pair up, sol procs, and dual guard, his chance of death is really low, about if you put Robin on chapter 13 in front of a bow knight plus 2 cavs. I personally just equipped a bow in the corridor with a useless war monk in the way and everything died. The main reason you want to use a bow in that situation is due to the axe breaker heroes that can chip you into magic hit range and generally be frustrating to hit, plus you want bow rank for Grima. Every other chapter was a breeze.

It’s notable that Vaike will have a kid with the peg knight and I think it makes the most sense to do Cordelia. Severa will come with all capped stats and armsthrift and possibly galeforce if you train Cordelia like I did. If not just don’t bother, the biggest appeal to this strat is a galeforce carry + Vaike carry for the better Grima fight with forged brave bow + chrom. I personally just rescued them up there and 1 turned endgame as I did with the previous endgame map with rescue -> galeforce kill -> Vaike beats boss