Ok, I'm a bit of NECA-fan. So I am up on the latest stuff for this.
Simon does come with a leather whip, and spiked chain whip.
Succubus does have a removable top.
The axe the succubus has is for Simon. When you collect all 4 you get EVERY subweapon from Cv1.
Simon has knife and cross boomarang.
Succubus has axe.
Dracula has stop watch.
Alucard has holy water (and the rosario).