Is there evidence to suggest that SRS/SBRT for spine or bone metastases provides faster and more durable palliative relief or soft tissue decompression than a fractionated course?

This question has two components. One is faster pain relief from spine metastasis, and the other is epidural tumor control from SRS/SBRT over EBRT. The answer is yes, but there has been no direct comparison. RTOG 0631 asked similar question, and is closed meeting the accrual, waiting for the results...