Which is better??

In the first photo the sky and water have a very natural color.  In the HDR shots, it is artificial looking, the kind of color you get in a cheaply printed book.  Also the grass and background trees have an unnatural rust color.

I applaud you for experimenting with HDR processing because there are times when it will produce a much improved image, but in this case you first image was a very nice shot and really doesn't need much if any processing.