The honest frame is to separate acquisition from analysis. Belkasoft X is a broad, enterprise-grade suite that does both: it acquires iOS through several methods including checkm8, acquires and analyzes Android, computers, memory dumps, drones and vehicles. It pulls from cloud services. It can create a full-filesystem image of a checkm8-vulnerable iPhone itself, then analyze it, all in one platform. That is a serious capability and this page does not diminish it.
Sherlock Forensics iPhone Analyzer sits on the analysis side of that line, for iPhone and iPad only, on Windows. It does not acquire a full-filesystem image and does not run checkm8; its own acquisition is a logical iPhone backup. For anything deeper it reads an extraction that another tool produced. So the comparison is not which tool is better in the abstract; Belkasoft plainly does more. It is a narrower question: if you already have or can obtain an iPhone extraction and your need is deep analysis and a court-ready report, do you require a full acquisition suite and a government-tier license for that piece or does a focused analyzer at a one-time $599 cover it.