Yes, you will have to fine tune the parameters as described in README.
Comparing the production of ETH with ETH+SC, the result of ETH will be similar.

The developer Claymore is concerned about disassembling his software.
It is OK to pay a small fee but several routines used in ZCash miner, the developer already made them for other miners (ETH miner) and he reused it (I would do the same) so it is questionable why the developer uses a DefFee of 2.5% in ZEC while he uses a DefFee of 1% in ETH.
He indirect incentive miners to “have a look” at his software miner, disassembling it (eg. reverse engineering with IDA). And it is a matter of time: 1 day, 1 week, 1 month, depends the free time of the who is re-creating the program. 

The CEX.IO may use your personal data (ID card, proof of residence, bank account) for unclear purposes (eg. scam approaches and identity theft)

Bellow it is written the email message send 25-Mar-2016 by a CEX.IO user:

---------------- start message send ----------------

Dear CEX.IO Manager

This is a complaint regarding the procedure done about my ID validation.

The reply that I received from your company was “Compliance officer's
comments: DO NOT USE IMAGE EDITORS! To proceed with the verification of
your account, we kindly ask you: 1) To provide us with scan or photo of
both sides of your ID in higher quality and in color; please note - all
information must be clearly visible, do not use image editors. (…)”

With the aim of showing that method of analyze is wrong I will comment
only the ID card topic.

a) it is not true that documents have low quality. They are high quality
scan of original documents and all information is readable.

b) Cex.IO wrote: “Do not use image editors”; I used image editor to
write all over A4 page “send to cex.io, for identity verification” using
a semi-transparent font. All information can be readable and there isn’t
any information destroyed with the words written by me.

c) There is no reason why your company request color copies of original
documents; a black and white (non color) copy is accepted in any place.

d) It is very strange that CEX.IO request color copies of ID card and
other personal documents and those copies cannot have security words as
“send to cex.io, for identity verification”, suggesting that CEX.IO
intends to use this information for unclear (and illegal) purposes.

From the internet it is known that these approaches (copy of ID cards,
proof of residence, bank account; all in color; without security words)
can be used to scam approaches and identity theft.

To ending this complaint, it is recommended that CEX.IO review their
procedures and start applying the validation methods used by most
European companies.

---------------- end message send ----------------

and the reply was:

---------------- start reply received ----------------

S. F. (CEX.IO), Mar 25, 09:08

Dear xxxxx,

I can not affect on a compliance decision, please follow his instructions

Best regards

S. F.
---------------- end reply received ----------------

This suggests that CEX.IO can use the personal information to scam approaches and identity theft.


Note: original copy of emails and document sent do CEX.IO are available under request.