The rod/stroke of a two litre engine built on a B16A block is going to be worse then a two litre engine built on a B18* pattern block due to the B16A's shorter deck height. The worse rod/stroke ratio means more parasitic engine drag and wear, not a good thing.

The forged crank is also a very expensive ($1500) option to the crower kit. Not really worth it unless you plan to build a super-powerful engine. To build a B16A with the 84mm bore you need to get 2l out of it, it needs to be resleeved and bored anyway.

Oh, an WCS: stroker kits make the crank taller and the rods typically shorter overall.