Doug is right. Though they are similar builders, they may use different materials. The roof shingles may be different, the foundations may be different, the plumbing may be different, the windows, siding, HVAC, flooring system are likely all different. Each builder will push their own product. You should find an agent to help you who is familiar with the different building systems and knows the differences. FYI, I have a CSP designation, which stands for Certified New Home Sales Professional. I have represented several new-home buyers, been on hundreds of home inspections, taken addtitional building courses, and I built my own home. Let me know if you need help. You should NOT be building a home without the help of a Realtor.