The Ruy Lopez is a good and solid opening, however, there's a slight problem. It is not easy to learn. You have to be prepared for a whole bunch of responses (Nf6 Berlin, a6 main line, Nd4 Bird, f5 Jänisch Gambit, Nge7 Cozio, Bc5 and so on...).
Sure, it is possible to find decent moves for White in all of these variations, but it is quite a lot of work. That's why some people recommend the Ponziani, which is not bad at all, and easy to learn.
According to my db search, the Ponziani has a similar winning score for white as the Ruy Lopez (41.6%; 40%),
only the percentage of white losses is a little lower in the Ruy Lopez.
Sure, it is possible to find decent moves for White in all of these variations, but it is quite a lot of work. That's why some people recommend the Ponziani, which is not bad at all, and easy to learn.
According to my db search, the Ponziani has a similar winning score for white as the Ruy Lopez (41.6%; 40%),
only the percentage of white losses is a little lower in the Ruy Lopez.