Which is better a 2-in-1 laptop or a laptop with a separate graphics tablet?

I currently have a Lenovo Idealpad z570 with a 15.6". I'm looking to update my current laptop and im not sure weather I should get a 2-in1 laptop such as the Lenovo yoga, or getting a normal laptop with an external graphics tablet.

I would like it to be as similar to my current laptop as possible, with a 15.6" screen
any help would be appreciated,
thank you

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