hi David
Welcome
May I suggest you hold fire on buying tools at this moment in your turning career. There is a trap awaiting ALL newby turners where we read or witness someone doing wonders with a tool and think we can buy our way to their kind of skill. This is, of course a false promise, only practice, practice and then a little more practice will improve your turning.
You already have a 3/4 scraper so why not regrind its curve , if that is your requirement. the bigger tool's extra width will make hardly any difference to its cut at all.
My biggest surprise is that I am the only one on the forum offering this advice.
All the very best
Brian