Well, I can't say if anyone responds better to an attorney than a private person filing claim as I don't know these people. But, consider that you're a business. Also consider that you are attempting to get money owed you. Further consider each of these situations:
You receive a letter on regular bound, college-ruled paper written in someone's own hand and its replete with: misspelled words, no citations of law, no expected duty or action; or you get a letter with a lawyer's name at the top which is typed up, grammatically correct (more or less), replete with fancy language like propounded, estoppel, tort law contract stipulations, statute of limitations, pursuant to (enter case citations here) and the like.
Which are you going to take more seriously?
For your case, say you get a note scribbled on something and then mailed to you. Or you get something from them an arbitration forum with citations of debts owed. Which did you take more seriously?
While any attorney can write letters and file motions (as can any private person) and passably handle a case for you, do you really want an entertainment attorney representing you on a credit card debt? Not to say he wouldn't be great at it - I'm not implying that. Or do you want an attorney whose practice, or a significant part of it, is in handling financial law?
I'd go with an attorney whose practice is heavily involved in handling consumer credit. There's also an old saying that anyone who represents himself as his own attorney has a fool for a client. It's not just a witty saying. When your interests are at stake, it's very easy to get too deeply involved emotionally to have the perspective needed to look at all the factors which might be relevant.

