ILR (Indefinite Leave to Remain) and ILE (Indefinite Leave to Enter) are in-principle both allowing the very same visa conditions once the holder arrives to UK, so don't be concerned about that.
The difference is solely 'visa-technical' in that ILR can only be officially issued within UK
whereas
ILE can only be issued outside UK in line with 'standard' Entry Clearance condition such as validity dates and expiry date.
Quite a few people with ILE actually apply for a No Time Limit endorsement (NTL) and this is very clear to employers that a right to work is granted. That ILE will show an expiry date and this can present potential employers with a challenge.
Look here at this link to see how to apply for NTL endorsement.
Be aware there is a yet another hefty charge of £104 for this.
Hope that clarifies the difference for you.