Cual camara me recomiendan para tomar fotografias la Nikon D5500 o la Canon EOS 70D?

Quiero comprarme la mejor camara de estas 2.

I'm sorry but you have chosen two cameras that are not of the same rank. The Canon EOS 70D is one step higher than the Nikon D5500. The Canon EOS 70D is more comparable to the Nikon D7200; and the Nikon D5500 is more comparable to the Canon T6i.

So, what makes the 70D a better camera than the D5500? We can start with weather sealing. The 70D has it and the D5500 doesn't. The 70D is GPS capable, the D5500 isn't. The 70D has a higher frame rate for continuous shooting (7 fps vs. 5 fps). The 70D has a faster maximum shutter speed (1/8000 vs. 1/4000). This gives you a flavor of what one step up does. There are other less obvious advantages, such as the 70D has a pentaprism viewfinder vs. The D5500's pentamirror. But like I said, you should really compare the 70D with the Nikon D7200.

BTW, you may be aware that all of these cameras have be superseded with newer models, the Canon 80D and the Nikon D5600 and the Nikon D7500.

Pentax K-70.

The Nikon camera sold nest to the Canon 70D is the Nikon D7100

The Canon camera sold next to the Nikon D5500 is the Canon T6i

You need to know that the two cameras you are comparing are actually comparable

If you visit DP Review, you can read the professional reviews of each of those cameras. Once you narrow down your choices, you can compare the sensor performance by visiting DXOmark.com

While it can take over a year for a novice to learn the fundamentals of photography, lighting and composition, it is usually a great idea to buy the best performing camera that fits your budget.

The importance of how a sensor performs in the areas of colour depth, dynamic range and low light (high ISO) will show up as your understanding of the fundamentals of using a camera increases.