Hi,
Depending on your objective:
If you mean winning the projects - there is no definite answer:
- In terms of pricing they operate in lower segment. Is it competitive or not? May be the case, since many clients are price sensitive. It will be especially the case in declining economy. Also Delloite gets lots of clients from audit business
- On the other hand MBB have stronger brand and clients are ready to pay for this brand
If you mean quality - MBB is better unless you don;t work with ex-mbb partners in Delloite
If you mean competitive for resume - MBB is definitely better
If you mean internal competition within the company among employees - There is no competition in any of these companies unless you are on the pre-partner level