What kind of expectations do you have ??, what class are you going for ??, N/A or Boosted ?? I think the Indy heads have a larger port volume 365cc or 385cc volume not CFM IIRC, the Brodix were smaller volume not sure off hand, but capable of being 400cfm flow after porting, either one can be made to work, I think it depends on your choice of head porters/engine builders recommendations, they both require expensive special specific components, pistons, rockers, intakes, push-rod, valves, springs, valley pan etc., I haven't run the Indy 572 H1 -13 yet, I did run the Brodix B1's years ago, not sure if they are even remotely the same head castings today, they were a great choice when I ran them, but were kind of the only game in town, back in the late 90's too... I'm pretty sure you can get them both in a CNC ported configuration to suit your specific needs... My old friend & head Porter Mark Lowe really liked them, may he Rest In Peace... Maybe IQ52 Jim {a professional head Porter/Engine builder}, will chime in here, he may know which is the better choice... I'd call & talk to both parties Indy & Brodix, talk to them & see what's all involved, the availability & customer support & the actual costs differences, port volumes, specialty parts, then weight the pros & cons... Good luck
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I think SSR was doing a set of the 600 or 572 series {not sure which now} from Indy, I think IQ52 was going to be doing/porting a set up or something if IRC...