Q: Are cards with the same name, but different card numbers considered the same card for the purposes of deckbuilding?
A: Cards such as Bo-20v and Bo-1149 which share the same name "digivice 01" are treated as the same card when building your deck, so you can't have more than 3 of them total. However, they are considered different cards for the purposes of "you may only place one of this card in your slots", so your slots may contain 1 Bo-1149 and 1 Bo-20v, but not 2 Bo-20v.