This is clearly a LOGO. Let's keep it real. I'm not one for pretending.
Yes, they can say it's the Sacred Heart of Jesus/Immaculate Heart of Mary.
But in that particular "form" it's 100% a LOGO for the Society of St. Pius X.
With the certain proportions, line art style, a SPECIFIC SVG (vector graphics) IMAGE -- that is the SSPX LOGO and everyone knows it.
And let's not FORGET the FACT that the SSPX went crazy about their "brand" and the control thereof about 2012. They spent money-that-folds on a corporate branding agency, after which time all their websites, media outlets, and endeavors began "unifying" under a pre-determined message, look, font, color scheme, etc.
Slightly before 2012, I was even approached by the SSPX and they amended my own contract with them. I was selling CDs containing material recorded at their US Seminary. What was the main idea they wanted? They wanted control of their brand. They were willing to give me back my paltry royalties, in exchange for me removing ALL REFERENCES to the SSPX and where these recordings came from. Of course I didn't care, since I wasn't exactly riding on their coat-tails. Quite the contrary. I made my own website, SEO, brand loyalty, customer base, etc. But the point is that they already wanted their name back, just a few years before 2012.
Just like any other corporation wants to promote a given image everywhere -- the SSPX started doing this in 2012. It's 100% Madison Avenue, Capitalism, corporate image branding. Like I said, that's literally what the Corporate Branding Agency does for a living -- establishes and maintains corporate brands for various corporations.
And the SSPX got in line with a wad of cash to enlist their ongoing services.