There is no easy answer to this question since it depends on a number of factors. If you're looking at overall performance, the Pixel 4a 5G does have better specs than the regular 4a. It has a slightly larger display, a better processor, and 5G connectivity. However, it's also more expensive. So if cost is a factor, the Pixel 4a might be a better option.
It really depends on your individual needs and preferences as to which phone is better. If you want the best performance and don't mind paying a bit more, then the Pixel 4a 5G is the way to go. But if you're on a budget and don't need 5G, then the regular 4a might be a better choice.