They look like different wall sections of the same building, which I think is what you want from it, so no, not too similar
It really does look amazing, looks like what the Forgeworld version of some of the 40k building kits would look like.
If the cost of the moulding is the bottleneck for you, you might consider figuring out the costs for creating a set of moulds that would satisfy your basic vision and then set up a Kickstarter/similar site project based on that. And if enough interest is drummed up, the stretch goal system is exactly what you need for expanding that basic kit.
I at least would be very interested in such a project and I think the quality of your sculpts more than warrant a stab at crow funding
