I have an app I want to launch for iphone and for ipad. The ipad version will be used by businesses to input content. The iphone app will be used by their customers on the go to
You can create an app with the same name if you choose the primary language as English UK and not the English US, for example.
You should make a universal app version of your app. That way it will be on both iPhone and iPad stores.
Two iOS apps currently can not have the same App store name (as entered in iTunes Connect), nor the same bundle ID suffix. They can, however, have the same name under the icon (the Bundle Display Name as entered in the app's plist). And two App store names can differ by as little as one character, punctuation mark or space. Or one can add a suffix, such as "for iPad" (check Apple's rules on use of the latter).
Yes the app name shouldn't matter unless it's copyrighted by someone else which I doubt.
Since the apps would also be separate, when searching for it on an iPhone, only the iPhone version will show, and vice verca. The only issue you may have is people searching for it on iTunes itself, which may cause in issue with the same names. You could also put on the end of the app name iPhone or iPad respectively. It should still look professional with the added names on the end, and will help out users searching for said app.
Hope this helps.