Absolute same Pistols Wayne. There are way more of the 21rd Model in stock and Buds prices are tied directly to stock level which is what's accounting for the large price difference.

same basic gun here is what Buds says about pricing
Our website updates every 20 minutes, 24/7, with our current inventory and replacement cost. We do not price our guns manually based on our cost in each, rather we use a live download from manufacturers and distributors to set our price based on our current replacement cost. As our cost changes, the corresponding website price of each make/model will change up/down accordingly. Although our profit margin remains unchanged, our advertised prices will change frequently, sometimes several times per day.