From what I've been able to find out, yes, it's pretty much the same. But you have to be aware that mineral water has potassium and magnesium, sometimes even so

From what I've been able to find out, yes, it's pretty much the same. But you have to be aware that mineral water has potassium and magnesium, sometimes even sodium and calcium. If you're drinking it as a substitute of plain water all day you are at risk of kidney stones and kidney damage (this is from a conversation with a nephrologist, but I haven't found any research paper talking about it). Sparkling water seems to be inoffensive. However, if you're going to add sugary flavor to it, remember that you need to add a lot of sugar to CO2-infused water to be able to taste it (that's why sodas have so much sugar but don't taste like it). Be careful with sugar and sparkling water.