Help with killswitch engage?

There cds aint available where I live so I only have a few songs of them,which one of the two leadsingers sang these,and where the first one really black?black metal singer haha awesome?Rose of Sharon,End of heartache,This Fire Burns,When Darkness Falls,Declaration,Word Ablaze,Take this oath.which one of the lead singers do you prefer or does both sound the same, please give me a popular song from both artists so I can compare,or any comparance