I used both RX100 and Sony A5000 Both great cameras.
Sony A5000 will give you better image quality with more features.
it also has power zoom option - you can hold and zoom with one hand.
NFC, Wi-Fi for image transfer also available on A5000.
Size different but RX100 not too small to easy keep it on the pocket, but heavy enough to drop it due to polished body.
Sony A5000 very easy to handle due to nice body style and not too big size and weight.
I do not like carrying extra lens around but power zoom will give you enough with included 16-50mm lens on sony a5000 or sony a5100