Hi Joseph, they are the same exact pistol, but one is made in Austria and the other in the USA.
The model that starts with P is Austrian made, the model that starts with U is made in USA.
The difference in price is explained by Bud's - "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. "
Stay safe & have a great day!

One is made in the good old US of A and one in Austria.

Hi Joseph and welcome. The only difference is one is made in USA, and one is made in Austria. The price difference is due to number of each in stock. Buds' prices are tied to stock level and same or similar higher stock items are lower priced and vice versa. Cheers and stay safe!