Hello Luana.
I think that it is safe to say that blade razors shave closer than electric razors, but then there are so many variations of both the it would be quite expensive to try each:
Single blades, double blades, triple blades, and so on. Then there are the single, or double or triple head electric razors, and to add to those you have the single double and even triple head foil electric razors.
To complicate matters a little more you have to deal with the type of beard you have, is it heavy, light, or fine or coarse. I would assume that you are using some form of razor now and if it is working for you then I would stick with it. But in the end you will need to try things out.
There are just as many different technics for shaving to get a very close shave and I'll let others expand on that. Many people first shave with the grain and then shave against the grain, but you would need to try it out as the is a greater risk of cuts and causing a rash or burn with shaving against the grain.
Another option is to use a blade razor daily and an electric/battery razor for touch-ups towards that 5 o'clock shadow time that some men suffer.
Just my 2 cents.
Steph