Is it better to take GRE first or IELTS? What are your opinions about it?

I was informed that most people take up GRE first and then take IELTS after around a week or two. But some people also suggest the other way around since IELTS is easier comparitively and gives you some boost in confidence while also giving you more time to prepare better for GRE in the meanwhile.
What are your opinions on that assuming you have only a month to prepare for both? Thanks.