As far as I know that the reaction by using the tetrabutylammonium bromide is better and easier, please read the ref. below

DOI: 10.1016/j.tetlet.2017.12.020

DOI: 10.1002/anie.201701947

DOI: 10.1016/S0040-4039(02)00217-4

Perchlorate ion is powerful oxidizing agent and therefor will show it's own oxidizing properties. So bromide salt is preferred.

The reaction by using the tetrabutylammonium bromide is better , please read these ref. below :

Chapter Principles of Phase-Transfer Catalysis by Quaternary Ammonium Salts

Article Third-phase catalytic activity of halogen exchange reactions...

It might be helpful

https://www.researchgate.net/publication/334163496_PHASE_TRANSFER_CATALYST_IN_ORGANIC_SYNTHESIS