Both turned professional in their teens and have done their fair share of fighting on the right-hand side of the bill. The pair have both reinvented themselves recently.
Renda (pictured above fighting Max Maxwell) used to put everything into every punch and would take one to land one.
BoxRec News' Martin Supple recalls being ringside for Renda's epic first clash with Paul Samuels in 2009:
"Renda and Butler both appeared on a cracking Hatton Promotions bill- topped by Matthew Hatton against Lovemore Ndou. Danny was outpointed over ten rounds by Darren McDermott for the English middleweight title, but it was Cello's clash with the dangerous Paul Samuels which grabbed all the headlines and ultimately became a cult classic with boxing fans around the world.
"In-the-know punters ensured an early arrival at the Fenton Manor Leisure Centre, as with both men being powerful, vulnerable fighters, it always promised fireworks. In an extraordinary battle, Renda decked Samuels in the opening round. In round two, the two big hitters landed simultaneous left hooks on each other's chins and with nobody present quite believing their eyes, both fighters crashed over flat on their back - a double knockdown. Renda rose on wobbly legs at four, whilst Samuels barely beat the count, getting up at nine, looking finished. But Samuels rallied and caught the tiring Renda with several unanswered shots in the third to score an unlikely stoppage."
These days, Renda can box and bang, and puts his faith in trainer Jon Pegg:
"I'm ready for anything. We've got Plan A, Plan B, Plan C and Plan D if I need them. I have instructions when I box now when in the past I was just told to get my hands up, chin down and get stuck in."
Butler says he's benefitted from working with Andy O'Kane. He headed to O'Kane's gym following a fourth loss in five fights at a good level, including a short-notice defeat to Darren Barker for the British and Commonwealth belts. He has gone on to hand both Frankie Borg and Tom Costello their first losses, with the 10th-round stoppage of Costello in March securing the vacant English middleweight title.
O'Kane said: "I think a lot of people wrote Danny off, but I really do genuinely believe the best is yet to come.
"The lads in the gym who had been handling him comfortably are nowhere near him now. A lot of guys who have known Danny for a long time say he is a different fighter now."
Butler moves better, Renda boxes more and both have everything to fight for at the Peterborough Arena. Renda says this is the biggest fight of his 10-year career, while Butler is desperate to make a title defence in Bristol, then challenge for bigger honours.
Both expect a tough fight. and Renda says home advantage gives him the edge:
"In the closing rounds when you're gasping for breath and short of energy, hearing the crowd cheering me on will lift me and push me on."
Read the original article on news.boxrec.com