Why is 称 used instead of 显示 in 消息称，苹果已经开始……? From a news article 中国市场不能丢！苹果在华销量暴增225%，iPhone12或支持北斗导航 (10 August 2020), we typically see 显示 meaning &quot;indicate&quot;:

有统计数据显示，……
……，苹果中国官网介绍显示，……
7月底苹果公布的第三财季的财报显示，……

In fact, I've become accustomed to seeing this 显示 sentence structure in news articles in general.  Thus I was a bit surprised by 称 (&quot;to state&quot;) in the following:

消息称，苹果已经开始对该系列手机的性能进行调试，包括对北斗导航的兼容性和测试。据悉，在此次发布会结束之后，苹果将在官网上明确新机对北斗的支持，以避免受到用户的吐槽。

I feel like there is a difference between 显示 and 称 here, but I don't know what it is.  It's possible it's a grammar point I'm missing, or that there is a technical difference indicating something unverifiable (akin to when English news uses the word &quot;allegedly&quot;).
Question: Why is 称 used instead of 显示 in the above sentence?
显示 = indicate

消息显示 - The announcer observes the information that's available and provides a report to the audience
The source of the information may or may not have provided the material directly to the announcer

称 = announce/ claim

消息称 - The announcer directly relays the announcement or claim from the source of information to the audience
The source of the information has made the announcement/ claim itself
Also:
证据显示 - evidence indicates (evidence doesn't make claim)
发言人称 - the speaker claims (speaker announces, not indicates an announcement)